
No. 5845-22/35
LA76075
Item
Symbol
Measurement
Point
Input
Signal
Measurement Procedure
Bus Condition
[Video Block]
Overall video gain
Measure CNTHB, the 50 IRE amplitude (Vp-p) of the
output signal, and substitute in the following formula.
PIX127 = 20log(CNTHB/0.357)
Pix : 1111111
PIX127
30
L-50
Contrast adjustment
characteristic
(Normal/max)
Measure CNTCB, the 50 IRE amplitude (Vp-p) of the
output signal, and substitute in the following formula.
PIX63 = 20log(CNTCB/0.357)
Pix : 0111111
PIX63
30
L-50
Contrast adjustment
characteristic (Min/max)
Measure CNTCB, the 50 IRE amplitude (Vp-p) of the
output signal, and substitute in the following formula.
PIX = 20log(CNTLB/0.357)
Pix : 0000000
PIX0
30
L-50
Video frequency
characteristic
f0 = 1(Sharp0)
Measure PEAKDC, the CW output signal amplitude
(Vp-p) for an input signal with CW = 100 kHz.
FO Select 01
Yf02
30
L-CW
Chroma trapping
f0 = 0(Sharp0)
Measure F00, the CW output signal amplitude (Vp-p)
for an input signal with CW = 3.58 MHz.
FO Select : 00
Sharpness : 00000
Ctrap
30
L-CW
DC propagation
Measure BRTPL, the 0 IRE DC level (V) of the output
signal.
Brightness : 0000000
Pix : 111111
ClampG
30
L-100
L-0
Y delay f0 = 1
Measure the time lag (delay) between the input signal
and the output signal for the rising edge of the 50 IRE
amplitude.
YDLY
30
L-50
Maximum black
stretching gain
Measure BKST1, the 0 IRE DC level (V) at point A of
the output signal with the black stretching function off .
BKSTmax
30
L-BK
Black stretching
threshold (40 IRE
black)
Measure BKST3, the 40 IRE DC level (V) of the output
signal with the black stretching function on.
Blk Str DEF : 0
BKST
TH
30
L-40
Sharpness (peaking)
variable characteristic
(normal)
(max)
(min)
Measure F00S16, the CW output signal amplitude (Vp-
p) for an input signal with CW = 2.2 MHz.
F0 Select : 00
Sharpness : 10000
Sharp16
Sharp31
Sharp0
30
L-CW
L-CW
Coring characteristic
Measure the CW output signal amplitude (Vp-p) for an
input signal with CW = 2.7 MHz twice with coring off
(A) and then on (B).
F0 Select : 01
Sharpness : 11111
Coring : off, On
Coring
30
L-CW
Horizontal/vertical
blanking output level
Measure RGB
BLK
, the DC level (V) for an output signal
blanking period.
RGB
BLK
30
L-100
Coring = 20log(A/B)
Sharp16 = 20log(F00S16/PEAKDC)
Measure F00S31, the CW output signal amplitude (Vp-
p) for an input signal with CW = 2.2 MHz.
Sharpness : 11111
Sharp31 = 20log(F00S16/PEAKDC)
L-CW
Measure F00S0, the CW output signal amplitude (Vp-
p) for an input signal with CW = 2.2 MHz.
Sharpness : 00000
Sharp0 = 20log(F00S0/PEAKDC)
Measure BKST4, the 0 IRE DC level (V) of the output
signal with the black stretching function off.
BKST
TH
= 50
×
(BKST4-BKST3)/CNTHB
Measure BKST2, the 0 IRE DC level (V) at point A of
the output signal with the black stretching function on.
Blk Str DEF : 0
BKS Tmax = 2
×
50
×
(BKST1-BKST2)/CNTHB
Measure DRVPH, the 0 IRE DC level (V) of the output
signal, and DRVH, the 100 IRE output signal
amplitude (Vp-p), and substitute in the following
formula.
ClampG = 100
×
(1 + (DRVPH-BRTPL)/DRIVH)
Brightness : 0000000
Pix : 111111
Ctrap = 20log(F00/PEAKDC)
f0 = 2(Sharp15)
Measure F02, the CW output signal amplitude (Vp-p)
for an input signal with CW = 8 MHz.
FO Select : 10
Sharpness : 01111
Yf02 = 20log(F00/PEAKDC)
Continued from preceding page.
Continued on next page.